FR2377621A1 - METHOD AND APPARATUS FOR DETECTING A CHANGE IN TEMPERATURE - Google Patents

METHOD AND APPARATUS FOR DETECTING A CHANGE IN TEMPERATURE

Info

Publication number
FR2377621A1
FR2377621A1 FR7801400A FR7801400A FR2377621A1 FR 2377621 A1 FR2377621 A1 FR 2377621A1 FR 7801400 A FR7801400 A FR 7801400A FR 7801400 A FR7801400 A FR 7801400A FR 2377621 A1 FR2377621 A1 FR 2377621A1
Authority
FR
France
Prior art keywords
temperature
radioactive
change
detecting
descendant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7801400A
Other languages
French (fr)
Other versions
FR2377621B1 (en
Inventor
Geoffrey A Barnett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
European Atomic Energy Community Euratom
Original Assignee
European Atomic Energy Community Euratom
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by European Atomic Energy Community Euratom filed Critical European Atomic Energy Community Euratom
Publication of FR2377621A1 publication Critical patent/FR2377621A1/en
Application granted granted Critical
Publication of FR2377621B1 publication Critical patent/FR2377621B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/30—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of the effect of a material on X-radiation, gamma radiation or particle radiation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Radiation (AREA)

Abstract

L'invention concerne un procédé et un appareil pour détecter un changement de la température dans un emplacement normalement peu accessible Le procédé selon l'invention consiste à placer une source radio-active 11 dans un emplacement prédéterminé, par exemple à l'intérieur du coeur 6 d'un réacteur nucléaire comportant un circuit réfrigérant 1, afin que la vitesse de dégagement du descendant radio-actif soit fonction de la température, le descendant radio-actif étant entraîné dans le fluide réfrigérant dont une partie est capturée dans un dispositif détecteur 16 dans lequel le descendant radio-actif, tel que du radon, est condensé, par exemple sur du charbon de bois activé, et dont le rayonnement gamma est mesuré par un spectromètre pour donner une indication du changement de la température. Un appareil selon l'invention convient en particulier dans le cas d'un réacteur nucléaire réfrigéré par de l'hélium.The invention relates to a method and apparatus for detecting a change in temperature in a normally inaccessible location The method according to the invention comprises placing a radioactive source 11 in a predetermined location, for example inside the heart 6 of a nuclear reactor comprising a refrigerant circuit 1, so that the rate of release of the radioactive descendant is a function of the temperature, the radioactive descendant being entrained in the refrigerant fluid, part of which is captured in a detector device 16 wherein the radioactive progeny, such as radon, is condensed, for example on activated charcoal, and the gamma radiation of which is measured by a spectrometer to give an indication of the change in temperature. An apparatus according to the invention is suitable in particular in the case of a nuclear reactor cooled with helium.

FR7801400A 1977-01-18 1978-01-18 METHOD AND APPARATUS FOR DETECTING A CHANGE IN TEMPERATURE Granted FR2377621A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB196977A GB1565901A (en) 1977-01-18 1977-01-18 Method of detecting a change in temperature

Publications (2)

Publication Number Publication Date
FR2377621A1 true FR2377621A1 (en) 1978-08-11
FR2377621B1 FR2377621B1 (en) 1981-08-21

Family

ID=9731239

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7801400A Granted FR2377621A1 (en) 1977-01-18 1978-01-18 METHOD AND APPARATUS FOR DETECTING A CHANGE IN TEMPERATURE

Country Status (3)

Country Link
DE (1) DE2801268A1 (en)
FR (1) FR2377621A1 (en)
GB (1) GB1565901A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11150143B2 (en) 2018-11-16 2021-10-19 Battelle Energy Alliance, Llc Temperature locale sensors and related methods
CN113029380B (en) * 2021-03-10 2021-12-14 南京航空航天大学 Online dynamic detection method for temperature field in industrial closed space

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2652497A (en) * 1950-06-16 1953-09-15 Arthur J Miller Temperature measurement
GB1191327A (en) * 1966-08-08 1970-05-13 Industrial Nucleonics Corp Machine Component Temperature Gauging Method and Apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2652497A (en) * 1950-06-16 1953-09-15 Arthur J Miller Temperature measurement
GB1191327A (en) * 1966-08-08 1970-05-13 Industrial Nucleonics Corp Machine Component Temperature Gauging Method and Apparatus

Also Published As

Publication number Publication date
DE2801268A1 (en) 1978-07-20
GB1565901A (en) 1980-04-23
FR2377621B1 (en) 1981-08-21

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Legal Events

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